It's Dunlop SP Sport Maxx tires. Front 255/35R20, Rear 285/30R20.
The reason for the 35 vs 30 is that it is wider in the rear and we don't like to have larger diameter on the rear wheels. It's probably not exactly the same, but roughly.

The middle number is the profile of the tire and it tells the sidewall height in percent of the tire width.

So in the front 245mm*35% = 85,75mm
and the rear 285mm*30% = 85,50mm
as you can see those two sizes will have a very similar tire sidewall and diameter.

i'm sure I speak for everyone when I say that we really appreciate your contribution remmiB as well as the guidance of those Modders with years of experience like Infamous, and Lacster, and ... (well, you know who you are).